shedlock



(No Model.) 3 sheets-snee@ 1;

A.. SHEDLOGK.

ROOK DRIYLYLING MACHINE.

No. 254,393. Patented Peb. 28,1882r mwfaiwf N. PETUis. PlmmLiumgmpner. wqsningmn. D, C,

(No M0de1.)' -3 sheets-sheet, 2.

A. SHEDLOGK.

ROOK DRILLING MACHINE. No. 254,393. Patented Feb. 28,1882.

(No Model.)

3 Sheets-Sheet 3.

A'.l SHEDLOCK.

ROCK DRILLING MACHINE.

Patented Feb. 28,1882.

NA PETERS. Phuwlilhugnphcr, wnsningmn, D. c,

. hand-power; andit consistsof certainimprove- -thc city ot' New York, county and 'as the quality of rock operated upon may de- "liable to get out of order, there being no bolts UNITED STATES i PATENT OFFICE.

ALFRED SHEDLOCK, OF NEW YORK, N. Y.

Rock-Dalmine MACHINE.

SPECIFICATION forming part of Letters Patent No. 254,393, dated February 28,1882.

Application tiled December 10,1881. (No model.)

To all whom it may concer-u Be it known that I, ALFRED SHnDLocK, of State ofNew York, have invented certain new and'useful Improvements in Rock-Drilling Machines, of which the following is a specification.

This invention relates to that class of rockdrilling machines designed to be operated by ments in the supporting-legs, whereby the ma chine may be readily adjusted in working position; of/'improvements in the construction and arrangement ofthe striking-hammerand its actuating-spring, whereby the halnmer has a direct linear movement to and from the drillholder, and the spring may be easily removed to be substituted by a stronger or weaker one,

mand, of an improved device for actuating the drill to and from the bottom of the hole and partly rotating it between each successive blow, so constructed as to obviate the necessity ot using spring-pawls or springs, and to make said movements of the drill perfectly positive; of an improved feeding device for carrying'the drill forward as fast asit performs its work; and it furt-her consists ot' such improvements in the generalconstruction and arrangement ofthe various parts that the same areilot or nuts in the machine to jar loose.

To enable others skilled in the art to which my invention appertains to make and use the same, I will now refer tothe accompanying drawings, formingpart of this specification, in which- Figurel,Sheet1,isalongitudinal central sectional elevation. Fig. 2, Sheet 2, is a plan view. Fig. 3, Sheet 3,is a part side elevation, showing another form oi' hammer-actuating device and springs, and also a modification in the feeding device. Fig. 4, Sheet 3, is a plan view ot'Fig. 3. Fig. 5, Sheet, is au enlarged transverse section of the same cut through the line m. Fig. 6, Sheet 3, illustrates another method of holding the hammer-spring in position. Fig. 7, Sheet l, is a transverse section cut through the line y y, Fig. 1, looking toward the face of the hammer. Fig. 8, Sheet 2, is a transverse section on the same line, yy, looking in the opposite direction. Fig. 9, Sheet 1, is a transverse section cut through the line z a, Fig. 1.

Fig. 10, .Sheet 2, is an enlarged view, partly in section, showingthedrillturning device slightly modified in form. Fig. l1, Sheet 2, is an enlarged transverse section ot' the-leg-clamping device; and Fig. l2, Sheet 8, represents the manner in which the three legs are attached to the rear end plate for upward drilling.

The frame consists simply of the rear end piece, a, and the side bars, a.' and a2, secured at one oftheir ends thereto. The end piece, a, is provided with three short rods. Two of them, n.3 a3, project at the sides and the other one, at, at right angles to them. It is also shown with a pad, a5, against which the operator may press when using the machine. The bar c is pointedat its front end, and the bar a2 is provided with an adjustable point, a, screwed on the end of it, to accommodate irregularities in the rock, and that both bars, a' and a2, may bear with equal pressure when the machine is adjusted to drill in the desired direction. The three supporting-legs are alike. They each consist of a straight rod, b, which passes through a hole in the bolt b', laterally enlarged, as shown at Fig. 11, and at right angles to this laterallyfenlarged hole-is formed another hole, partly in the head of the bolt b', adapted to receive the short rods a ai* of the end piece, a, and the end of the side bar, a.

Between the rod b and bar @'or rods a3 c4, are placed two washers, b2 and b3, having partly-circular recesses to embrace their respective rods, and the contact-faces of these washers are preferably rougheued or radially corrugated to prevent them shifting when the legs are set; or a friction-washer may be placed between. On the bolt b', beyond the rod b, is placed the washer b4, and on its eXtreme end is the tightening-nut b5. By means of this ar-l rangement of parts each leg maybe set in any position by simply loosening the nut b5, the rod b then being free to slide longitudinally through the bolt b' and washers b3 b4 to adjust the machine as to height, and free to move sidewise in the laterally-enlarged hole in the bolt b to adjust the rod bin an angular position in one direction, the angular position in the other direction being provided for by the bolt b turning on the rods a3 or a4 or bar a', on which itis placed;

and when set as desired IOO all parts are irmly held by simply tightening the nut b5.

In Figs. 1, 2, 7, and 9 a leg is shown on each of the short rods a3 of the rear plate, a2, and the third one on the front end of the side bar, a. This is the disposition of tbe legs when the machine is operating into the face of a rock, from which it will be seen the machine is self-sustaining. The object of the third short rod, a4, on the plate a is to enable the leg on the end of the bar et to be used in upward drilling, as shown in the diagram sketch, Fig. l2, or in downward drilling, the plate a being then in reverse position to that shown in Fig. 12.

The workingparts ofthe machine, with the exception of the hammer, are contained in or connected to the body or frame c, composed of the cylindrical shell, girders c c', and end piece, c2, and bearings c3 c4, which lit. freely on the bars a a?. In bearings on the cylindrical part of the body c is fitted to rotate the feedscrew d, which passes' through the nut-flame e, adapted to be clamped in any desired position on the .bars a and n2 by the set-screws c', closing the split bearings on the bars. In this frame e are pivoted the two half-nuts e2, which are closed down on the screw cl by springs e3. It will be observed that this screw hasaratcbetshaped thread, the object of which is to prevent any injury to the screw or halfnuts if the hammer be allowed to act against the drillplunger when the end of the drill is away from the rock, and it permits the body and drill to be pushed forward, the springs of the nuts e2 e2 allowing them to slide over the thread of the screw d in the one direction. The ends of the half-nut project above the fra me e, and one of them has pivoted toitthe cam-lever c4, which, when pressed down between their ends, separates the nuts from the screw d, leaving the body of the machine free to be moved on the bars a a2 when it is desired to withdraw the drill from the hole or to set-the machine for a continuation ofthe feed after the screw d has moved the body as far forward as it can, which resetting is accomplished by slackening the set-screws e of the nut-frame e and moving the nut-frame forward on the bars a! and ci?, to be again secured thereto', and the half-nuts c2 allowed to embrace thel screw d by throwing back the cam-lever c4.

The screwd is provided with a head, d," which bears against its front bearing, and has secured to its other end the toothed wheel or disk cl2, which bears against its rear bearing, so that While free to.be rotated it'has no longitudinal play. It is actuated by the pawl cl3, pivoted on them-op of the yokef, iitted in a groove turned in the plungerf, to the front end of which the drillfZ/is secured. This plungerf has a reciprocating motion imparted to it by means hereinafter described, said motion varying in extent according to the work done by the drill. The pawl d3 moves with the plungerf,a11d

being cam-shaped near its end, which is provided with the projection d4, in the teeth adapted to catch of the wheel d2, said end is caused jarring back or to move laterally as the pawl is dra-wigbackward by the cam working over the roller or stud d5 on the body c, and it is held thereto by the spring d6. The frontedges ofthe teeth of the wheel d2 are pointed, as shown, and the projection d4 lies beyond these teeth when the pawl is in its extreme forward position. Now, assume the pawl to be in the position shown in the drawings and to be drawn back by the plungerf, the projection d4 enters the space between the two lower teeth, and as the pawl rides over the roller or stud c5 the projection d4 carries the wheel cl2 one tooth forward, and so partly rotates the screw cl and feeds the drill forward a distance in excess of the greatest depth it is capable oi' cutting at one blow, the blow of the hammer being imparted to the drilljust before it,with theplungerf, is moved back, and if this blow has not caused the drill to cut the maximum depth, then when the plungerf moves forward, carrying with it the pawl d3, the projection d4 will remain in the space between the teeth it previously entered, and so slide backward and forward therein until the plungerf is allowed to make its forward maximum movement. Then theprojection slips over beyond the front edge of the next tooth, and the pawl cl3 is moved laterally back by the spring dG against the roller or stud c25, bringing the projection d4 again into position to catch into the succeeding space of the wheel d2 when the pawl is next moved back bythe plungerf. The. pressure of the spring-actin g half-nuts c2 on the screw d will in most cases be suiiicient to hold the screw l and toothed wheel cl2 from moving too far ahead; but to insure the teeth ofthe wheel d2 being in proper position for t-he pawl d3 to actuate it, I propose to arrange an ordinary spring pawl or catch, all, to engage in the teethV of the wheel d2, as shown in Figs. 2 and ll.

In the modification of the feeding device shown at Figs. 3, 4, and 5 the wheel g on the screw d has face ratchet-teeth. The pawl g is caused to slide backward and forward by the plungerf in a similar manner to the pawl d3. The projection on the pawl g is caused to enter one of the ratchet-teeth of the wheel g by the pin near its pivotal center striking against the fixed bracket g2, when the pawl, with the plunger, moves into the extreme forward position, and when the plunger moves back the pawl g moves into the angular position, as shown by the dotted lines in Fig. 4, and so turns the wheel g one tooth. The pawl remains in this last position until it is again knocked back by the bracket g2, as shown.

lIhe drills of this class of machine have heretofore been pressed back against the bottom of the hole by means of a spring after being moved therefrom to receive a partial rotation. Now, in this machine the drill is actuated both as regards its to-and-fro motion and rotation by means of positive-acting devices,lso that the minimum of power is required to operate this part of the machine and the liability of deran gement entirely avoided. A good prac- IOO tical way of carrying this out is as follows:

The rear end of the plunger j" is fitted to rotate in the head h, whicll is provided .with

a sleeve, h', fitted in the end of cylindrical partV -of the body' c, and this head has a positive cated near the end of the sleeve h', allowing the plunger a little play longitudinally in the head h, which will about equal each forward.

movement due to the feed, so as to prevent the cam ibinding ill the head h when .they move the head and plun ger f forward, should the drill strikethe bottom of the hole before the head has completed its full movement, the plunger beillg so moved forward by the end of the sleeve h/striking the collar f3 and moved back by thc wornrwheel j striking the other end of the bearing ill head h. Instead of the collar f3, the end of the slot in the sleeve h', through which the upper part of the yokef passes, may be used to move the plunger forward with the head.

In some cases-as, for instance, in upward drilling-it may be advantageous to employ a smallspring to hold the worm-whee1j to the end of the head h.. Y In sucll case, where the construction of the head h as shown at Fig. l0 is used, I propose to place said spring between the yokefand the shoulder of the head h, reducing the plunger in this part to accommodate the spring; or the spring h4 may be I- placed outside the worm-wheelj and the head h made in two parts and screwed together to 4form a box for the spring, as shown at Figs. l

operating to turn the wheel j, which takes place just after the cams @"2 have withdrawn the drill from the bottom of the hole. It will be observed that the worm-wheel j, beillgcarried by the head h, challges its position under the worm-cam j; but the teeth of the wormwheel j and worin-cam j are so shaped as to properly work together during such movement of the wheel j. As the cams i 'i2 are doubleactin g, the drillis withdrawn and partly rotated twice during each revolution of the shaft i.

Shaft i has bearings in the girders o of the body c, and is rotated by the crank-handles k. Secured to the shaft just outside the bearillgs in the girders e are the two throw-cams l l. These cams operate the striking-hammer m by acting on the rollers m m. The hammer in this machine is adapted to slide on the side bars, a a2, of the frame by the bearings m2 m2,

clearly shown ill Fig. 6, the plug n' being detached. The object of so shaping these striking-plugs is to obviat-e as lnuch as possible thev spreadillg of them froln the continual blows by providing them with considerable colltactsurface, and the concavity ofthe plug nv tends to cause the plug n' to retaill its shape. Tile concavity and convexity of the plugs a and n may be reversed.

One of the main features of this invention is the method of al'lplying the striking-spring to the machine, the object beillg to secure it. ill place, without employing any screws ol bolts therefor, in such a manner that all possibility of its getting loose is obviated. besides prof viding for the ready removal ofthe same and replacing it by another spl-ing of different strength wllendesired. Several formsofsprings are shown,but they are all retained ill position in substantially the same manner between the front side of the end pieces, c2, of the body c alld the real side of thehalnlner m In Figs. 1, 2, alld 7 all elliptic spring, o, is shown, the ends of tlle leaves of which are bent round and conllected together by hooking saldround ends over the pills of the yoke-pieces o o, one of the pins being separable from its y oke, to be inserted through it and the corresponding rounded elld of the spring after the other three rounded ends have been pla-ced over their pins in the yokes. The centers of the two sides of the elliptic spring o are pullctured alld titover the studs o2 and o3 on the end piece, c2, alld hammer m. The spring is placed ill position bypassing it between the girdersc' of the body and end piece,`c2,and hammer m, and compressing it to allow the. two sides to spring over the studs o2 and o3.

Bowspringsp p, made of` illt steel, are shown in Figs 3 alld 4, held ill place by simply passing their roullded ends over bars 1J p', formed on the end piece, c2, and hammer on. This form of spring is preferable ill lnost respects to the elliptic spring, alld the simplest manner of securing it ill place is that shown in Fig. 6, wllere the elids of the bow-spring q are merely bent at right angles to tit illto Iecesses q alld g2, formed in thecellterol' the hammer m and end piece, c2. One spling only is here shown. Two springs may be usedone above, the other below-it thought best; but one spring will be sneient to impart the required impetus to the hammer m, as said form of springs may be made of any strength desired. From the foregoing it will be seen that IOO IOS

the spring maintains its position between the hammer m and end piece, c2, by reason of its resilience only.

It is advantageous that the working palts of machines of this description should be protected from the grit and dust, &c. To enable this to be done I propose to continue the ribs ofthe gir-ders o so as to meet the rear bearing of the feed-screw d, as shown at Figs..3 and 4, thus forming the three sides ofa box in which most ofthe working parts are contained, and the top covered by a wrought or cast metal plate bent down iu l'rout of the cuins and plunger, and provided with a hole, through which the strikiug-plugufthehammermaypass. Aplate muy be cast on the body to form the bottom of the box.

To enable the hammer-actuating device to be also placed iu the iuclosing boX, I propose to substitute for the ordinary cams l l the arms 'r r, provided at their ends with the rolleisrr, which', when the arms are rotated, come in contact with 4the ends of the arms s s, projecting from the front of the hammer m, as shown at Figs. 3 and 4, and so move back the hammer against the springs pp. It will be observed that these arms r r occupy much less space than the cams l L, and may be placedinside the girde'rs do', as shown, and formed, if desired, in one piece with the cams i', i2, and j. The front bearing of the hammer is shown at the ends ofthe arms ss,therebyincreasing the length ofthe hammer bearing on the side bars,a a2,of the frame. This form ot' hammeractuating deviceis in some respects superior to the cams Z t, and may be placed outside the girders c' c', as are the cams I Z.

It will be observed from the preceding description and from reference had to the drawings that in this machine no nuts or bolts are employed in the construction of it; so the liability of any of the parts becoming deranged or being lost is obviated, Which derangement or loss of parts is very liable to happen tomachines of this class in whichnuts and bolts are used, on account of the continuousjarring they are subjected to.

Having now described my invention, what I claim, and desire to secure by Letters Patent,

isf 1. In an adjustable leg for rock-drilling machines, a straightJ supporting-rod adapted to slide through a bolt fitted at right angles on a rod or a bar of the frame, clamping-washers between the straight supporting-bar and said rod or bar, and a nut on the end of the bolt for clamping the whole together, substantially-as described.

2. In combination, the straight supportingrod b, the bolt b', having two holes at right angles through it, one of which is laterally enlarged, the clamping-washers I)2 b3 b4, the nut b5, and the rod or bar of the frame, adapted to pass through the plain hole in the bolt, substantially as set forth.

3. A frame for rock-drilling machines, composed ot' the two side bars, a a2, the one,a,of which is pointed and the other one, a2, provided with an adjustable point, the end pieces, a, having the three short rods a3 a3 a4, in combination with three adjustable supporting-legs, two adapted to be connected to. the short rods a3 a3 andthe other tothe front end of one of the side bars,a,aud also to the short -rod a4, substantially as and for the purpose set foi th.

4. A frame for rock-drilling machines, composed of a rear end piece and two side bars,

on which the body and operating parts of the machine slide, the front end of one of the side bars being-pointed and the other one :being provided with an adjustable point, substantially as and for the purpose set forth.

5. The body c, composed of a cylindrical shell, in which lits the drill-holding plunger, an end piece, c2, the connecting-girders c c', provided with bearings for the driving-shaft, and the bearings c3 c4, by which the body c is supported and free to slide on the side bars of the frame of the machine, substantially as set forth.

6. In a rock-drilling machine, a body carrying the operating mechanism and adapted to slide on the side bars of the frame, a hammer, also adapted to slide on the said side bars between one end of the main portion of the body and an end piece connected thereto by girders, and a springlocated between the hammer and end piece of the frame, and adapted by its resilience'to drive the hammer against the end of a plunger fitted in the main portion or cylindrical shell of the body, substantially as and for the purpose set forth.

7. The combination,with a sliding hammer and end piece of the body, of a spring adapted to be secured to the hammer and end piece and maintain its position between them by reason of its resilience only, substantially as set forth.

8. The curved at spring q, in combination with the end piece, c2, having the recess g2, and the hammer m, having the recess q', substantially as set forth.

9. In combination, the body c o c 02 c3 o4, the hammer m,with the actuating-cams on the shaft z', andthe spring q, substantially as set forth.

10. The striking-plug of the hammer, having a concave face, in combination with the plug at the end of the drill-plunger, having a convex end, substantially as and for the purpose set fort-h.

ll. A drill-holdin g plunger tted to slide in the body ofthe machine, and operated to reciprocate to move the point of the drill to and from the bottom of the hole positively in both directions by means substantially as described, and actuated from the driving-shaft.

12. A drill-holding plunger fitted to slide in the body of the machine, and operated to reciprocate to move the point of the drill to and from the bottom of the hole positively in both directions by means substantially as described, and actuated from the driving-shaft, in combination with a compensating-spring.

13. A drill-holding plunger fitted to slide and rotatein the body of the machine, in combinationwith means, substantially as described,

for positively moving the drill to and from the IOO IIO

head h, having bearers 71.2 h3,

wheel j,

bottom of the hole, and means, substantially as described, for intermittently rotating the same when away from the bottoni of the hole.

14. In combination, the plunger f', sliding head h, having bearers k2 h3, worm-wheel j, and cams t" i2, whereby the plunger f is caused to move to and from the bottom ot' the hole positively in both directions, substantially as described.

15'. In combination, the plunger f', sliding cams i i2, wormand worm-cams j, whereby the plunger j" is caused to move to and from the bottom of the hole positively in both directions, and be positively rotated when away from the bottom of the holesubstantially as described.

16. In combination, the plunger f', adapted to receive a reciprocating movement after each blow of the ,hammer thereon, the worm-wheel j, and worm-cams j', substantially as described.

17. In combination, ger f', sliding head la, cams t" 2,worm-wheel j and spring h4, whereby the head h is allowed to move a short distance after the drill has reached the rock, substantially as set forth.

18. In a rock-drill, a body carrying the operating parts of the machine and adapted to slide on the two side bars of the frame, in combination with the feed-screw fitted to rotate in bearings on the body, and a nut-holding frame adapted to be adjusted in position on and secured to the said side bars, substantially as set forth.

19. A feed-screw for rock-drilling machines, having a ratchet-shaped thread, substantially as and for the purposeset forth.

20. In combination with a ratchet-shapedthread feed-screwitted in bearing on the body, sprin g-actin g half-nuts, carried by a frame con-,f

the drill-holding plunnected to the main frame of the stantially as set forth.

21. In combination, the screw d, the toothed wheel d2, the spring-acting pawl d3, the yoke f, the roller or stud d5, and plunger f', substantially as set forth.

22. In combination, the screwd on the. body and the half-nuts e2, provided with the springs c3, and the nut-frame e, substantially as described.

23. A drill-holding plunger fitted to slide in the body of the machine, and operated to reciprocate to move the point of the drill to and from the bottom of the hole positively in both directions by means substantially as described, and actuated from the driving-shaft, in coinbination with a compensating-spring and a feeding device constructed and operated to feed the machine forward as fast as the drill cuts, substantially as set forth.

24. A drill-holding plunger fitted to slide in the body of the machine, vand operated to reciprocate to move the point of the drill to and from the bottom ofthe hole positively in both directions by means substantially as described, and actuated from the driving-shaft, in combination with a compensating-spring, a feeding device constructed and operated to fer-d the machine as fast as the drill cuts, and a springactng hammer, substantially as set forth.

In witness whereof I have hereunto set my hand, at New York, county and State ofNe'w York, this 8th day of December, A. D. 1881.

ALFRED SHEDLOOK.

machine, sub- H. D. WILLIAMS. 

